Power hammer



Sept. 25, 1928. 1,685,447

w. w. BIELER POWER HAMMER Filed March 9, 1926 2 Sheets-Sheet 1 /8jwuanto'o I?! I I Sept 25, 1928.

. POWER HAMMER w. w. BIELER} Filed March 9, 1926 2 Sheets-Sheet 2 gwoeniu Patented Sept. 25, 1928.

UNITED STATES WILLIAM W. BIELER, 0F HAYS, KANSAS.

POWER HAMMER.

Application filed March 9, 1926.

This invention relates to power hammers and it is an object of theinvention to provide an apparatus of this kind wherein the anvil ismaintained in desired posit-ion by the supporting structure for theapparatus and which anvil extends to the base of the apparatus.

Another object of the invention is to provide an apparatus of this kindemploying a helve carrying the upper die or hammer, said helve beingsupportedin a manner permitting the motion of the die or hammer to befree and flexible due to the fact that the helve carries no unnecessaryweight. 7

Furthermore, it is an object of the invention to provide an apparatus ofthis kind wherein the means for operating the helve comprises flatsprings arranged above and below the helve and in connection with theoperating means for the helve, said springs permitting the helve or moreparticularly the outer or hammer carrying end to have vibration.

An additional object of the invention is to provide an apparatus of thiskind comprising a supporting frame constructed and assembled in a mannerto provide an effective structure and with which the anvil is detachablyengaged to permit said anvil being removed when it is desired to dressthe same.-

The invention consists in the details of construction and in thecombination and arrangement of the several parts of my improved powerhammer whereby certain important advantages are attained and the devicerendered simpler, less expensive and otherwise more convenient andadvantageous for use, as will be hereinafter more fully set forth.

The novel features of my invention will hereinafter be definitelyclaimed.

In order that my invention may be the bet ter understood, I will nowproceed to describe the same with reference to the accompanyingdrawings, wherein Figure 1 is a view in side elevation. illustrating anapparatus constructed in accordance with an embodiment of my invention;

Figure 2 is a sectional View taken substantially on the line 2-2 ofFigure 1;

Figure 3 is a view in side elevation of the helve and the partsconcomitant thereto removed;

Figure 4 is a view in top plan of the struc- Serial No. 93,526.

ture as illustrated in Figure 3, the coacting bearings for the helvebeing indicated by broken lines;

Figure 5 is a view in perspective of th frame and anvil as hereinemployed, with the helve and its associated parts removed.

As disclosed in the accompanying drawings, the supporting frame Fembodied in In improved apparatus comprises the end sills 1 eachconstituting an angle iron having a flange a vertically disposed and thelower flange 6 being adapted to be suitably anchored to a desired base.

Secured to the vertical flange a of each of the sills 1 are theupstanding beams 2 the same constituting angle irons with a flange 0 ofeach of said irons inwardly disposed and its second flange d outwardlydirected and directly connected by the rivets 3 or the like to theflange a of an end sill 1. The lower portions of the horizontallyaligned flanges 0 of the beams 2 are connected by the horizontallydisposed beams f riveted, as at 5, or otherwise secured to the inwardlydirected flanges c, said beams f extending a predetermined distancebeyond an end pair of beams 2. Each of these beams 1 also preferablyconstitutes an angle iron and has one of its flanges e outwardly andhorizontally disposed with its second flange f downwardly directed andwith which the connection 5 coaets. As herein disclosed, there isinterposed between each of the beams 2 and beams 4a spacer block 6. V

The upper portions of the horizontally or longitudinally disposed beams2 are connected by the beams 7 each of which also constituting an angleiron having an upwardly disposed inner vertical flange g riveted, as at8, to the inwardly directed flanges 0 of the beams 2 and with its lowerhorizontal flange h outwardly disposed.

Connected to the inwardly disposed flanges c of the beams 2 at one endof the apparatus and to the upstanding flanges g of the beams 7 are thebrace members 9, said members being preferably maintained in appliedposi tion through the medium of the rivets 10.

These brace members 9 preferably coact with manner but preferably by thebelt 14 operatively engaged with the pulley 15 carried by one endportion of the shaft. This shaft 12 also carries a' second pulley 16with which is DQIililVOly engaged a belt 17 said belt 17 extendinginwardly alongside the frame F and operatively engaging with a pulley 18mounted upon one end of the shaft 19. This shaft 19 extends transverselyof the beams 4 and is rotatably supported by the bearings 20 secured tothe flanges c of said beams. v

The shaft 19 betweenthe beams 4 is provided with a crank 21 of requisitethrow and with which crank is freely engaged a bearing 22. 'lhisbearing22' is suitably affixed to the extremities of the parallel bars 23 ofpredetermined length extending upwardly of the frame between the upperbeams 7. The upper extremities of the bars 23 are operatively engagedwith a bearing 24 which in turn is pivotally connected, as at 25, withthe lower end portions of the upstanding elongated arms 26. he arms 26are connected at points spaced lengthwise thereof by the transverselydisposed bolts 27 to each of which is secured the free end portion of aflat spring 28, each of said spring being preferably of a laminatedtype. The opposite end portions of the springs are clamped, as at 29, tothe pivoted end portion of the hammer helve 30, said springs beingpositioned above and below the helve and disposed on a curvature towardtheir outer ends in a direction away from the helve. The clamping means29 for the helve 30 includes a bottom plate 31 to which is held atransversely disposed shaft 32 coacting, with the bearing blocks 33 atopposite sides of the helve 30 and mounted upon an outstanding table orplatform 34 at the upper end of the beam 2 beyond which the beams 4extend and with which the brace members 9 are engaged. This mounting ofthe helve 3O permits the same to have free rocking movement in avertical direction, such movement being transmitted thereto through thesprings 23 as flexed or vibrated upon recurrent movement of the arms 26.v,

As is particularl illustrated in Figure 4, one end portion of t e shaft32 is continued by a forwardly directed extension 35 secured as at 36,to the helve 30 at a predetermined point outwardly of its pivotalconnection.

Snugly positioned between the flanges c of the beams 2 remote from thepivoted end of the helve 30 is an anvil 37. This anvil comprises anelongatedbar of mild steel the upper portion of which being hardened toform the lower die for the hammer 38 secured to and depending from theouter or free end por tion of the helve This anvil or bar 37 whenapplied has its lower end substantially coplanar with the under surfaceof the out stand ng flanges 7) of the end sills lso that the impactimposed from above upon the anvil or bar 37 by the hammer 38 will bealso received upon the base or foundation upon which the apparatus ismounted.

The anvil or bar 37 is detachably maintained in applied position by thebolts 39 extending transversely through the anvil or bar 37 and theinwardly directed flanges o of the adjacent beams 2 at points spacedlengthwise of said beams. By having the anvil or bar 37 removable thesame can be readily taken out when desired to dress the anvil asrequired.

The upper stretch of the belt 17 passes under an idle pulley 40 carriedby the outer end portion of a rock arm 41 arranged at one end portion ofa rock arm 42 extending transversely of the beams 4 and rotatablyengaged with the bearings 43 secured to the upper flanges e of saidbeams. V

The opposite end of the arm 42 outwardly of the apparatus is providedwith an elongated operating arm 44 terminating in an inwardly disposedextension 45 providing a pedal whereby the pulley 40 may be caused toengage the upper stretch of .the belt 17 to bring said belt in requisitefrictional contact with thcpulley 2-1 to effect the required rotation ofthe shaft 19. It is to be understood that normally the belt 17 is loosebut upon the desired operation of the pedal 45 the shaft 19 may berotated as desired and released as preferred in accordance with thecharacter of the blow or impact of the hammer 38 desired.

The pulley 40 is normally maintained in a raised position through themedium of a retractilemember or coil spring 46 suitably anchored at oneendto the rock arm 41 and having its opposite end attached to one of theupsition asillustrated in Figure 1 of the drawings. Each of the rods 23has an end portion disposed through a bearing 22 or 24 and such endportion is held to the associated hearing by the nuts 23' threaded onsaid rod and'contacting with the upper and lower faces of the bearing.By backing off one set of nuts 23 and taking up the slack with theopposite pair at either or both of the bearings 22 and'24 the length ofthe rod or rods between the'bearings 22 and 24 may be lengthened orshortened in order to effect the requisite .adustment to cause thehammer 38 to stand out a particular distance from the anvil 37 saidadjustmentbeing necessary to compensate for spring tension, speed andhammer weight.

From the foregoing description it is I be obvious that my invention issusceptible of some change and modification without departing from the.principles and spirit thereof and for this reason I do not Wish to beundertsood as limiting myself to the precise arrangement and formationof the several parts herein shown in carrying out my invention inpractice except as hereinafter claimed.

I claim z- A power hammer comprising a stand having an anvil locatedthereon, a shaft having angularly disposed end portions, a hearingreceiving one end portion and mounted upon the stand, a helve attachedat a point between its ends to the other end portion of the shaft anddisposed transversely of the first mentioned end portion thereof, leafsprings 10 mounted at the opposite sides of the helve, and having endportions secured to the helve at the first mentioned portion of saidshaft, a hammer head carried by the helve and adapted to engage theanvil and power operated means connected with the free ends of the leafsprings.

In testimony whereof I hereunto affix my signature.

WILLIAM W. BIELER.

